Polypeptide vs. Protein

Polypeptidenoun

(organic chemistry) Any polymer of (same or different) amino acids joined via peptide bonds.

Polypeptidenoun

(biochemistry) Any such polymer that is not folded into a secondary structure of a protein.

Polypeptidenoun

(protein) A small protein containing up to 100 amino acids; see also oligopeptide.

Polypeptidenoun

a peptide containing 10 to more than 100 amino acids

Proteinnoun

(biochemistry) Any of numerous large, complex naturally-produced molecules composed of one or more long chains of amino acids, in which the amino acid groups are held together by peptide bonds.

Proteinnoun

(nutrition) One of three major classes of food or source of food energy (4 kcal/gram) abundant in animal-derived foods i.e. meat and some vegetables, such as legumes.

Proteinnoun

In chemical analysis, the total nitrogenous material in vegetable or animal substances, obtained by multiplying the total nitrogen found by a factor, usually 6.25, assuming most proteids to contain approximately 16 per cent of nitrogen.

Proteinnoun

any polymer of an amino acid joined by peptide (amide) bonds. Most natural proteins have alpha-amino acids as the monomeric constituents. All classical enzymes are composed of protein, and control most of the biochemical transformations carrie dout in living cells. They may be soluble, as casein, albumins, and other globular proteins, or insoluble (e. g. "structural proteins"), as collagen or keratin. "albumin", an older term for protein, is now used primarily to refer to certain specific soluble globular proteins found in eggs or blood serum, e.g. bovine serum albumin, the main soluble protein in teh serum of cattle, used as an enzymatically inert protein in biochemical research.

Proteinnoun

any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes;

Protein

Proteins are large biomolecules and macromolecules that are comprised of one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location to another.